Description Usage Arguments Value Examples
Calculate z-scores for WHZ, HAZ, WAZ using the WHO Growth Reference (2006) for a cohort or sample of children.
1 | getCohortWGS(data, sexObserved, firstPart, secondPart, index)
|
data |
Data frame containing the variables needed for calculation |
sexObserved |
Sex of child (1 = Male; 2 = Female) |
firstPart |
Weight (kg; for WHZ and WAZ) or height (cm; for HAZ) |
secondPart |
Age (months; for HAZ and WAZ) or height (cm; for WHZ) |
index |
One of "wfh", "hfa", "wfa" (specifies the required index) |
Numeric vector of z-scores
of the anthropometric index selected
The function fails messily when secondPart
is outside of the range
given in the WGS reference (i.e. 45 to 120 cm for height and 0 to 60 months
for age). It is up to you to check the ranges of your data.
The reference data for W/H assumes supine length is used for children with a standing height below 85cm
Heights should be specified in cm to the nearest mm (i.e. to 1 d.p.)
Ages should be specified in whole months
Weights should be specified in kg to available precision
The function requires reference data wgsData
included in this package
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | # apply getWGS to first child in sample data anthro1
wazAll <- getCohortWGS(data = anthro1,
sexObserved = "sex",
firstPart = "weight",
secondPart = "age",
index = "wfa")
wazAll
hazAll <- getCohortWGS(data = anthro1,
sexObserved = "sex",
firstPart = "height",
secondPart = "age",
index = "hfa")
hazAll
whzAll <- getCohortWGS(data = anthro1,
sexObserved = "sex",
firstPart = "weight",
secondPart = "height",
index = "wfh")
whzAll
|
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